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<title>MCore Options (Using the GNU Compiler Collection (GCC))</title>

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<h4 class="subsection" id="MCore-Options-1"><span>3.19.26 MCore Options<a class="copiable-link" href="#MCore-Options-1"> &para;</a></span></h4>
<a class="index-entry-id" id="index-MCore-options"></a>

<p>These are the &lsquo;<samp class="samp">-m</samp>&rsquo; options defined for the Motorola M*Core
processors.
</p>
<dl class="table">
<dt><a class="index-entry-id" id="index-mno_002dhardlit"></a>
<a id="index-mhardlit"></a><span><code class="code">-mhardlit</code><a class="copiable-link" href="#index-mhardlit"> &para;</a></span></dt>
<dt><code class="code">-mno-hardlit</code></dt>
<dd><p>Inline constants into the code stream if it can be done in two
instructions or less.
</p>
</dd>
<dt><a class="index-entry-id" id="index-mno_002ddiv-1"></a>
<a id="index-mdiv-2"></a><span><code class="code">-mdiv</code><a class="copiable-link" href="#index-mdiv-2"> &para;</a></span></dt>
<dt><code class="code">-mno-div</code></dt>
<dd><p>Use the divide instruction.  (Enabled by default).
</p>
</dd>
<dt><a class="index-entry-id" id="index-mno_002drelax_002dimmediate"></a>
<a id="index-mrelax_002dimmediate"></a><span><code class="code">-mrelax-immediate</code><a class="copiable-link" href="#index-mrelax_002dimmediate"> &para;</a></span></dt>
<dt><code class="code">-mno-relax-immediate</code></dt>
<dd><p>Allow arbitrary-sized immediates in bit operations.
</p>
</dd>
<dt><a class="index-entry-id" id="index-mno_002dwide_002dbitfields"></a>
<a id="index-mwide_002dbitfields"></a><span><code class="code">-mwide-bitfields</code><a class="copiable-link" href="#index-mwide_002dbitfields"> &para;</a></span></dt>
<dt><code class="code">-mno-wide-bitfields</code></dt>
<dd><p>Always treat bit-fields as <code class="code">int</code>-sized.
</p>
</dd>
<dt><a class="index-entry-id" id="index-mno_002d4byte_002dfunctions"></a>
<a id="index-m4byte_002dfunctions"></a><span><code class="code">-m4byte-functions</code><a class="copiable-link" href="#index-m4byte_002dfunctions"> &para;</a></span></dt>
<dt><code class="code">-mno-4byte-functions</code></dt>
<dd><p>Force all functions to be aligned to a 4-byte boundary.
</p>
</dd>
<dt><a class="index-entry-id" id="index-mno_002dcallgraph_002ddata"></a>
<a id="index-mcallgraph_002ddata"></a><span><code class="code">-mcallgraph-data</code><a class="copiable-link" href="#index-mcallgraph_002ddata"> &para;</a></span></dt>
<dt><code class="code">-mno-callgraph-data</code></dt>
<dd><p>Emit callgraph information.
</p>
</dd>
<dt><a class="index-entry-id" id="index-mno_002dslow_002dbytes"></a>
<a id="index-mslow_002dbytes"></a><span><code class="code">-mslow-bytes</code><a class="copiable-link" href="#index-mslow_002dbytes"> &para;</a></span></dt>
<dt><code class="code">-mno-slow-bytes</code></dt>
<dd><p>Prefer word access when reading byte quantities.
</p>
</dd>
<dt><a class="index-entry-id" id="index-mbig_002dendian-7"></a>
<a id="index-mlittle_002dendian-7"></a><span><code class="code">-mlittle-endian</code><a class="copiable-link" href="#index-mlittle_002dendian-7"> &para;</a></span></dt>
<dt><code class="code">-mbig-endian</code></dt>
<dd><p>Generate code for a little-endian target.
</p>
</dd>
<dt><a class="index-entry-id" id="index-m340"></a>
<a id="index-m210"></a><span><code class="code">-m210</code><a class="copiable-link" href="#index-m210"> &para;</a></span></dt>
<dt><code class="code">-m340</code></dt>
<dd><p>Generate code for the 210 processor.
</p>
</dd>
<dt><a id="index-mno_002dlsim-1"></a><span><code class="code">-mno-lsim</code><a class="copiable-link" href="#index-mno_002dlsim-1"> &para;</a></span></dt>
<dd><p>Assume that runtime support has been provided and so omit the
simulator library (<samp class="file">libsim.a)</samp> from the linker command line.
</p>
</dd>
<dt><a id="index-mstack_002dincrement"></a><span><code class="code">-mstack-increment=<var class="var">size</var></code><a class="copiable-link" href="#index-mstack_002dincrement"> &para;</a></span></dt>
<dd><p>Set the maximum amount for a single stack increment operation.  Large
values can increase the speed of programs that contain functions
that need a large amount of stack space, but they can also trigger a
segmentation fault if the stack is extended too much.  The default
value is 0x1000.
</p>
</dd>
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